<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="test"></div>


  <script src="../js/react.development.js"></script>
  <script src="../js/react-dom.development.js"></script>
  <script src="../js/babel.min.js"></script>
  <!-- props限制 -->
  <script src="../js/prop-types.js"></script> 

  <script type="text/babel">
    class Demo extends React.Component {
      showData = () => {
        const {input1} = this
        alert (input1.value)
      }

      showData2 = () => {
        const {input2} = this
        alert (input2.value)
      }
      render () {
        return (
          <div>
            <input type="text" name="" ref={(c)=>{this.input1 = c}} placeholder='点击按钮提示数据'/>&nbsp;
            <button ref='button1' onClick={this.showData} >点我提示数据</button>&nbsp;
            <input ref={c=>this.input2 = c} type="text" placeholder='失去焦点提示数据' onBlur={this.showData2} />
          </div>
        )
      }
    }
    

    ReactDOM.render (<Demo />, document.getElementById ('test'))


   
  </script>
</body>
</html>